Create new table + view regex_whitelist + rename old regex table to regex_blacklist. This updates the gravity.db version to 3.

Signed-off-by: DL6ER <dl6er@dl6er.de>

advanced/Scripts/database_migration/gravity-db.sh

@@ -29,4 +29,11 @@ upgrade_gravityDB(){
 			database_table_from_file "domain_audit" "${auditFile}"
 		fi
 	fi
+	if [[ "$version" == "2" ]]; then
+		# This migration script upgrades the gravity.db file by
+		# renaming the regex table to regex_blacklist, and
+		# creating a new regex_whitelist table + corresponding linking table and views
+		sqlite3 "${database}" < "/etc/.pihole/advanced/Scripts/database_migration/gravity/2_to_3.sql"
+		version=3
+	fi
 }